Arena



FIG. 1 is a perspective view of a first embodiment of an arena, showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and

FIG. 7 is a bottom plan view thereof.

FIG. 8 is a perspective view of a second embodiment of an arena;

FIG. 9 is a front elevational view thereof;

FIG. 10 is a rear elevational view thereof;

FIG. 11 is a left side elevational view thereof;

FIG. 12 is a right side elevational view thereof;

FIG. 13 is a top plan view thereof; and,

FIG. 14 is a bottom plan view thereof.

The broken lines immediately adjacent the shaded areas encompassing unshaded/non-stippled regions, represent the bounds of the claimed design while all other broken lines are directed to environment and are for illustrative purposes only and form no part of the claimed design. 

CLAIM We claim the ornamental design for an arena, as shown and described. 